|
Try
Angle =
Atan((LR_Line-Ref(LR_Line,-1))/x-Ref(x,-1));
where the prior point is the origin of your grid.
The answer may be in radians. Check help
----- Original Message -----
Sent: Wednesday, July 20, 2005 3:44
PM
Subject: RE: [amibroker] Some Math Help
Please
Graham,
I am trying
to determine the angle of the Linereg and Ema lines at a particular point in
time. For instance, if you draw a 90 degree horizontal and vertical line and
the Linereg comes through the intersection of that 90 degree, what angle is
the linereg relative to the 90 degree base. If I could include an image I
could probably express it a little better.
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| /
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/ need the angle of this.
|/_____________________
Thank
you
Tom
In what way are you getting wrong
numbers?
Are you wanting the angle of the linreg line?
The results
look ok to me after plotting.
You have to remember that slope is
an arbitrary number in charts. You
must calculate it to suit the scaling
factors that affect it if you
want to gtet the answer similar to what you
see on the screen. The
screen drawn angle will change as you zoom in/out of
the chart and may
possibly be the same as calculated figure if yuo get
lucky.
I have stated this before some time ago, angle means
absolutely
nothing by itself as you have no reference in which to base
it.
On 7/21/05, mymail <grpmail@xxxxxxxxxxxxxxxx>
wrote:
> Graham,
>
> I read the thread as it went on.
Unfortunately, I am doing something wrong,
> as I am not getting the
correct numbers.
>
> Here is my code snippet. Did I miss
something obvious?
>
>
>
> LSMA =
LinearReg(C, 25 );
>
> EMA34 = EMA(C,34);
>
>
a=atan(LinRegSlope(LSMA,3));
>
> b=atan(LinRegSlope(EMA34,3));
>
> RAD_TO_DEG = 180/3.1415926; // radians to degrees
>
> Angle = RAD_TO_DEG * a;
>
> Angle1 = RAD_TO_DEG * b;
>
> "LSMA ANGLE IS: "+ WriteVal(Angle);
>
> "EMA34
ANGLE IS: "+ WriteVal(Angle1);
>
> -----Original
Message-----
> From: amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx]On Behalf
> Of Graham
> Sent:
Wednesday, July 20, 2005 5:44 PM
> To: amibroker@xxxxxxxxxxxxxxx
>
Subject: Re: [amibroker] Some Math Help Please
>
> just had that
discussion here this week re slopes calculation
>
> slope =
(value2 - value1) / (bar2 - bar1);
> angle_rad =
atan(slope);//radians
> angle_deg = angle_rad *
180/3.1416;//degrees
>
> On 7/21/05, mymail
<grpmail@xxxxxxxxxxxxxxxx> wrote:
> > Thank you Joe, good
advice. Unfortunately, I was trying to get Math help
> > rather than
AFL help. It has been so long that I studied Trig that I
>
forgot
> > how to calculate the angle of a line.
> > So for
instance, how would I calculate the angle in degrees of a line such
>
> as a moving average?
> >
> > thank you
>
> Tom
> >
> > -----Original Message-----
>
> From: amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx]On
> Behalf
> > Of Joe
Landry
> > Sent: Monday, July 18, 2005 8:27 AM
> > To:
amibroker@xxxxxxxxxxxxxxx
> > Subject: Re: [amibroker] Some Math Help
Please
> >
> >
> >
> > AN EXAMPLE:
> >
> > I don't know why your codes doesn't work but
building on what Graham wrote
> > here's a an example (since I had to
fight through this at one time)
> >
> > This is a snippet
from one of my indicators is based on Dimitris's work
> > ....BB is
the slope of the line at the last bar. I write it out on the
>
> chart
> >
> > as follows
> >
> >
Title= FullName()+" "+ Date()+"\n"+ "Slope of Regression Line(X1000) =
"+
> > WriteVal(10000*bb);
> >
> > If
you're new to this script, I'd recommend you take up one of the most
>
> productive practices I've found and
> >
> > adapt for
your work. Find an information database(I use Infoselect)
for
> > your system and clip every interesting indicator or algorithm
you
> >
> > see used in this forum for your own
library. This of course would be in
> > addition to what Graham
recommended 2-3 weeks back...going through each
> > function and
using the function in a test program .
> >
> > Searching
the archives 2-3 years back for Graham's and Dimitris Tsokakis'
> >
work would also pay off.
> >
> > Best regards
> >
> > JOE
> >
> >
> >
>
>
> >
> > // Plot the slope of the relative
strength line
> >
> > //
> >
> >
Daysback = 126; // 6 months
> >
> > x = Cum(1); // the X
axis, abscissa
> >
> > LastX = LastValue(X);
> >
> > C1 = Issue2Rel; // the Y axis, the ordinate
> >
> > aa = LastValue( LinRegIntercept( C1, Daysback) );
> >
> > bb = LastValue( LinRegSlope( C1, Daysback ) );
> >
> > yy = Aa + bb * ( x - (Lastx - DaysBack) ); // the algebraic
equation for a
> > straight line
> >
> > yy=IIf( x
>= (lastx - Daysback), yy, -1e10 ); // roll the plot forward and
>
> show only the 6 months
> >
> > Plot( yy,
"LinRegression Line", colorDarkRed,styleThick);
> >
> >
UpperSEBand = YY + 2*StdErr(Issue2Rel,126);
> >
> >
LowerSEBand = YY - 2*StdErr(Issue2Rel,126);
> >
> >
Plot(UpperSEBand,"Upper 2 Sigma",colorBlue,styleLine);
> >
>
> Plot(LowerSEband,"Lower 2 Sigma",colorBlue,styleLine);
> >
----- Original Message -----
> > From: valrox1
> > To:
amibroker@xxxxxxxxxxxxxxx
> > Sent: Monday, July 18, 2005 12:36
AM
> > Subject: [amibroker] Some Math Help Please
> >
> > I am trying to calculate the angle of a plotted slope in
degrees.
> > Below is the code I thought would work, but
doesn't.
> >
> > Any thoughts?
> >
> >
Thank you
> > Tom
> >
> > LSMA = LinearReg(C, 25
);
> >
> > a=atan(LSMA);
> >
> >
RAD_TO_DEG = 180/3.1415926; // radians to degrees
> >
> >
Angle = RAD_TO_DEG * a; //
> >
> > Plot( Angle, "LSMA",
colorYellow, styleThick);
> >
> >
> > Title =
"Angle=" + Angle + EncodeColor(colorWhite) + " "
+ Date
> > ();
> >
> >
> >
> >
> >
> >
> > Please note that this group is for
discussion between users only.
> >
> > To get support from
AmiBroker please send an e-mail directly to
> > SUPPORT {at}
amibroker.com
> >
> > For other support material please
check also:
> > http://www.amibroker.com/support.html
>
>
> >
> >
> >
> >
> >
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>
> > Visit your group "amibroker" on the web.
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>
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>
>
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> >
________________________________
> >
>
>
> --
> Cheers
> Graham
> http://e-wire.net.au/~eb_kavan/
>
>
> Please note that this group is for discussion between users
only.
>
> To get support from AmiBroker please send an e-mail
directly to
> SUPPORT {at} amibroker.com
>
> For other
support material please check also:
> http://www.amibroker.com/support.html
>
>
>
>
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>
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>
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________________________________
>
--
Cheers
Graham
http://e-wire.net.au/~eb_kavan/
Please note that this group is for discussion between users only.
To get support from AmiBroker please send an e-mail directly to
SUPPORT {at} amibroker.com
For other support material please check also:
http://www.amibroker.com/support.html
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|